Control device and method supporting single IO (Input/Output) virtual user level interface

Abstract

The invention discloses a control device and a control method supporting a single IO (Input / Output) virtual user level interface. The device comprises a system bus interface module, an operation module, a DMA (Direct Memory Access) module and a network pack distribution arbitration module, wherein the system bus interface module is used for transmitting data between the device and a processor and realizing a transaction layer, a data link layer and a physical layer function which are accordant with a PCI (Peripheral Component Interconnect) Express protocol; the operation module is used for realizing mapping among an equipment configuration space, a communication interface QP with a virtual function (VF) and an operation queue (OQ) resource and directly accessing the QP by using a doorbell system, and comprises M operation queues; M is more than or equal to 1; the DMA module is used for mapping a DMA engine according to the idle condition of the DMA engine; the DMA engine is used for transmitting and receiving data; and the network pack distribution arbitration module is used for receiving a network pack transmitted by the DMA engine, arbitrating and selectively transmitting the network packs of different DMA engines, receiving network packs in the network at the same time, and transmitting to the DMA engine for processing.

Description

technical field [0001] The invention relates to I / O virtualization technology, in particular to user-level communication interface technology in computer interconnection, and to network interface controller technology in server system. Background technique [0002] The performance of a server system is determined by its computing power and communication power. With the continuous increase of the number of processors in the server system and the continuous improvement of the performance of a single processor, higher requirements are put forward for its communication performance. The improvement of communication performance is closely related to the design of the network interface controller. A network interface controller refers to a hardware device used to connect a processor to an interconnection network and has a certain network processing capability. Since the network interface controller is located between the processor and the interconnection network, its performance ...

AI Technical Summary

Problems solved by technology

However, the guest operating systems (Guest OS) running on the virtual machine have different address spaces, so that the traditional network interface controller cannot be directly shared and accessed by each guest operating system.

The communication interface provided by it must require the arbitration and address remapping of the virtual controller layer (Hypervisor), which ultimately leads to the inefficiency of user-level communication.

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